1 Project Update and Summary of Project Priority List (PPL) Activity November 12, 2015

Project Update – Agenda –Project Portfolio Update p. 3-6 Recent/Upcoming Project Highlights 2015 Release Targets 2016 Release Targets 2015 Project Spending Update 2016 Project Spending – Initial Forecast –Appendix Project Portfolio Gantt Chartp Location of Project Priority List (PPL):

3 Recent / Upcoming Project Highlights 2015 October Release – Week of 10/19/2015 Complete –NPRR556 – Resource Adequacy During Transmission Equipment Outage –NPRR595 – RRS Load Resource Treatment In ORDC –NPRR698 – Clarifications to NPRR595, RRS Load Resource Treatment In ORDC –NPRR706 – Restore the ability to use Physical Responsive Reserve Capability as an Indicator of Available Frequency-Responsive Capacity –NPRR710 – Removal of ORDC Phase 2 Language and Modification to HASL Calculation 2015 December Release – Week of 12/7/2015 In Flight –NPRR680 – Allow QSEs to Self-Arrange AS Quantities Greater Than Their AS Obligation –NPRR686 – Changing the IRR Forecast from Next 48 Hours to Next 168 Hours Wind elements Note: Projected Go-Live dates are subject to change. Please watch for market notices as the effective dates approach.

Release Targets – Board-Approved NPRRs / SCRs / xGRRs ERCOT Public Go-live dates can differ from Protocol effective dates – Please refer to market notices for more details Release targets are subject to change NPRR589(b) – S&B portion NPRR686(a) – Wind portion SCR774(b) – Addition of Comments field (a), (b), etc. indicates multiple phases Red Text: New additions and target release changes Strike-Through Text: Previous target release changes February 2/2 – 2/12 March 3/23 – 3/27 JuneSeptember 9/7 – 9/11 October 10/19 – 10/23 December 12/7 – 12/11 NPRR500 SCR772 SCR778 SCR779 NPRR559 NPRR597 NPRR601 NPRR639 NPRR543 NPRR626 NPRR645 NPRR665 SCR774 (b) SCR775 OBD (Shadow Price Caps) SCR771 NPRR589 (b) NPRR701 NPRR556 NPRR595 NPRR698 NPRR706 NPRR710 NPRR680 NPRR686 (a) TBD Items (and month they became “TBD”) E Project Status Codes: NS = Not Started, I = Initiation, P = Planning, E = Execution, H = On Hold Aug 2014Oct 2014Dec 2014Jan 2015Jun 2015 NOGRR084NPRR327 HNPRR272, SCR777 HNPRR210, NPRR664 Late May 6/13 (CMM) 6/22 – 6/26 EEEEEEEEEE September 9/21 – 9/25

Release Targets – Board-Approved NPRRs / SCRs / xGRRs ERCOT Public Go-live dates can differ from Protocol effective dates – Please refer to market notices for more details Release targets are subject to change NPRR484(Ph1b) – Remaining Phase 1 items NPRR484(Ph2) – S&B portion of NPRR NPRR686(b) – Solar portion (a), (b), etc. indicates multiple phases Red Text: New additions and target release changes Strike-Through Text: Previous target release changes February Dates TBD March Dates TBD June Dates TBD August Dates TBD September Dates TBD December Dates TBD NPRR515 NPRR553 NPRR588 NPRR615 NPRR686 (b) NPRR700 RMGRR126 NPRR515 NPRR617 NPRR620 NPRR662 NPRR679 NPRR700 RRGRR003 EMS Upgrade NPRR419 RMGRR126 NPRR495 NPRR662 NPRR219 NPRR573 NPRR714 SCR783 NPRR210 NPRR272 RRGRR003 RRGRR006 SCR Project Status Codes: NS = Not Started, I = Initiation, P = Planning, E = Execution, H = On Hold I H NS I NS P EEEE EEEE E I NS I I NS 2016 TBD Items (and month they became “TBD”) July 2015September 2015October 2015 NPRR439 I, NPRR519 I, NPRR620 I, NPRR683 I NS May 5/23 – 5/27 EMS Upgrade “Chill” CMM Bundle Release Date TBD

Project Spending Update 2015 Project Budget = $21.65M Any excess spending in 2015 will be offset by equal reductions in 2016 spending (ERCOT projects only) December includes a Data Center Refresh hardware purchase that will be offset by 2016 Data Center funding

Project Spending – Initial Forecast 2016 PPL Budget = $22.5M “Potential Demand” includes internal ERCOT projects that have not been fully approved as well as 2015 excess project spending

Project Update – Appendix –Appendix 10/31/2015 Project Gantt –In-flight items sorted by Project End Date –“On Hold” projects listed separately –“Not Started” items sorted by Project Start Date

9 ERCOT Public Project Portfolio Status – as of 10/31/2015

10 ERCOT Public Project Portfolio Status – as of 10/31/2015

11 ERCOT Public Project Portfolio Status – as of 10/31/2015

12 ERCOT Public Project Portfolio Status – as of 10/31/2015

13 ERCOT Public Project Portfolio Status – as of 10/31/2015

14 ERCOT Public Project Portfolio Status – as of 10/31/2015